Keyboard

Modifier is metaKey || ctrlKey (Command on macOS, Control elsewhere). The listener is on document so a click on a non-focusable block still receives the chord.

While a text field or TipTap surface is focused, undo/redo and Delete/Backspace stay with the field.

Chord	Action
Mod+S	Save, when a templates provider can save
Mod+Z	Undo. TipTap handles this while editing text
Mod+Shift+Z	Redo. Same text-editing exception
Escape	Deselect the current block
Delete / Backspace	Remove the selected block. No-op while typing

Palette

Click, Enter, or Space on a sidebar palette item inserts that block below the selection (or at the end when nothing is selected). A nested column child cannot accept a section — MJML forbids mj-section in mj-column — so a section insert lands after the parent section. Same rule as duplicateBlock.

Drag-and-drop is pointer-emulated (force-fallback). There is no keyboard drag.

Saved-blocks pick session

While picking blocks to save:

Chord	Action
Escape	Cancel the session
Enter	Confirm (disabled at zero picks)
Delete / Backspace	Swallowed — does not delete canvas blocks

Arrow Up/Down on a focused reorder grip in the save dialog moves a preview row.